Lee Min-ho
Lee Gon

Kim Go-eun
Jung Tae-eul / Luna

Woo Do-hwan
Jo Eun-sup / Jo-young

Kim Kyung-nam
Kang Shin-jae

Jung Eun-chae
Goo Seo-ryung / Goo Eun-ah

Lee Jung-jin
Lee Rim

Jeon Moo-song
Lee Jong-in / Prince Boo-young

Kim Yeong-ok
Noh Ok-nam

Jeon Bae-soo
Jung Do-in

Seo Jeong-yeon
Song Jung-hye

Park Won-sang
Park Moon-shik

Park So-jin
Jo Hae-in

Baek Hyun-joo
Lee Gon's Secretary

Kang Hong-suk
Jang Michael / Jang Mi-reuk

Kim Yong-ji
Myung Na-ri / Myung Seung-ah

Lee Hong-nae
Seok Ho-pil

An Si-ha
Kim Hee-joo

Choi Woo-sung
Kim Ki-won

Jung Hyeon-jun
Young Lee Gon / Lee Ji-hun

Kim Si-woo
Young Jung Tae-eul

Moon Woo-jin
Young Shin-jae / Kang Hyun-min

Noreen Joyce Guerra
Moon Seung-ih

Lee Hae-yeong
Yoo Kyung-moo

Yoon Ju-man
Young Yoo Kyung-moo

Hwang Young-hee
Min Hwa-yun / Park Sook-jin

Ryu Sung-rok
Kyu-bong

Heo Dong-won
Detective Shim

Song Sang-eun
Kyung-ran

Hwang Se-on
Park In-young

Shin Hyeon-jong
Lee Jung-hoon

Lee Hwang-eui
Prime Minster's Adviser

Kang Ki-doong
Secretary Kim

Jang Hae-min
Prime Minster's Staff

Kim Jung-young
Kim Sung-ae